Q25 of 330 Page 66

The elements of electrical heating devices are usually made of:

An electric heating element is generally made from nichrome and can come in the shape of either a coil, ribbon or wire strip. When electricity is introduced into the heating element, its internal temperature increases and grows red hot as it begins to radiate heat outward

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23

The current passing through an electric kettle has been doubled. The heat produced will become:

 24

An electric fuse works on the:

 26

The heat produced in a wire of resistance ‘x’ when a current ‘y’ flows through it in time ‘z’ is given by :

 27

Which of the following characteristic is not suitable for a fuse wire?